Floods and landslides disaster started in 2013. Electronic media and print media preach calamity that causes a lot of material damage and even loss of life. Here are some of the events of landslides that occurred in the month of January 2013:

Landslides is a process of mass movement or mass of soil and rock debris that moves down the slope compilers result from the disturbance of the stability of the slope soil or rock slope.

Landslides problem especially in Indonesia, are common due to geographical circumstances which in some places have high rainfall and the potential for an earthquake. High rainfall is considered as a major factor kelongsoran because water can erode a layer of sand, rock lubricate or increase the water content of a clay thereby reducing shear strength. The possibility of landslides due to rain yet to be attributed to several factors such as local topography, geological structure, soil properties and soil permeable morphology.

The topography is hilly with a slope that is almost perpendicular resulted in many unstable slopes. The phenomenon of instability of a slope can be classified into the collapse of the slope (slope failure) and avalanche (landslide). Collapse of slopes and avalanches can occur in a quarry and in a heap.